47 research outputs found

    Outstanding supercapacitive properties of Mn-doped TiO2 micro/nanostructure porous film prepared by anodization method.

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    Mn-doped TiO2 micro/nanostructure porous film was prepared by anodizing a Ti-Mn alloy. The film annealed at 300 °C yields the highest areal capacitance of 1451.3 mF/cm(2) at a current density of 3 mA/cm(2) when used as a high-performance supercapacitor electrode. Areal capacitance retention is 63.7% when the current density increases from 3 to 20 mA/cm(2), and the capacitance retention is 88.1% after 5,000 cycles. The superior areal capacitance of the porous film is derived from the brush-like metal substrate, which could greatly increase the contact area, improve the charge transport ability at the oxide layer/metal substrate interface, and thereby significantly enhance the electrochemical activities toward high performance energy storage. Additionally, the effects of manganese content and specific surface area of the porous film on the supercapacitive performance were also investigated in this work

    Outstanding Supercapacitive Properties Of Mn-Doped Tio 2 Micro/Nanostructure Porous Film Prepared By Anodization Method

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    Mn-doped TiO2 micro/nanostructure porous film was prepared by anodizing a Ti-Mn alloy. The film annealed at 300 °C yields the highest areal capacitance of 1451.3 mF/cm2 at a current density of 3 mA/cm2 when used as a high-performance supercapacitor electrode. Areal capacitance retention is 63.7% when the current density increases from 3 to 20 mA/cm2, and the capacitance retention is 88.1% after 5,000 cycles. The superior areal capacitance of the porous film is derived from the brush-like metal substrate, which could greatly increase the contact area, improve the charge transport ability at the oxide layer/metal substrate interface, and thereby significantly enhance the electrochemical activities toward high performance energy storage. Additionally, the effects of manganese content and specific surface area of the porous film on the supercapacitive performance were also investigated in this work

    Synthesis of novel conjugates of a saccharide, amino acids, nucleobase and the evaluation of their cell compatibility

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    This article reports the synthesis of a novel type of conjugate of three fundamental biological build blocks (i.e., saccharide, amino acids, and nucleobase) and their cell compatibility. The facile synthesis starts with the synthesis of nucleobase and saccharide derivatives, then uses solid-phase peptide synthesis (SPPS) to build the peptide segment (Phe-Arg-Gly-Asp or naphthAla-Phe-Arg-Gly-Asp with fully protected groups), and later, an amidation reaction in liquid phase connects these three parts together. The overall yield of these multiple step synthesis is about 34%. Besides exhibiting excellent solubility, these conjugates of saccharide–amino acids–nucleobase (SAN), like the previously reported conjugates of nucleobase–amino acids–saccharide (NAS) and nucleobase–saccharide–amino acids (NSA), are mammalian cell compatible

    Luminescent property of La(OH)3: Eu3+ nanorod and its decomposed compounds of LaOOH and La2O3

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    In this work, aiming to evaluate and compare the luminescent property of Eu ^3+ doped La(OH) _3 nanorods and its decomposed compounds of LaOOH and La _2 O _3 , La(OH) _3 : Eu ^3+ nanorods were synthesized and the decomposition behaviors in air and hydrogen were revealed. Then the luminescent property of 0%–8% Eu ^3+ doped La(OH) _3 nanorods and the 300 °C–800 °C calcined La(OH) _3 : Eu ^3+ - 4% were studied. Results show that LaOOH is intermediate product during the degradation of La(OH) _3 in air or H _2 , which can be formed at a temperature range in 372.3 °C–592.9 °C in air. Intensity of emission spectra of La(OH) _3 : Eu ^3+ nanorods increases with the rising of Eu ^3+ dopant concentration, and the emission property of Eu ^3+ doped LaOOH and La _2 O _3 is varied and strengthened with that of La(OH) _3 : Eu ^3+ . Luminescent matrixes of LaOOH and La _2 O _3 show similar emission spectrum and intensity, and the transitions of the D _0  →  ^7 F _1 and D _0  →  ^7 F _2 of Eu ^3+ each bifurcate into two peaks for both europium (III) doped La _2 O _3 and LaOOH. The revealed results suggest that LaOOH is a relative thermal-stable compound and should be an appropriate matrix as similar as La _2 O _3 for luminescent applications
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